pci-bridge.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:2k
- /*
- * BK Id: SCCS/s.pci-bridge.h 1.11 05/21/01 01:31:30 cort
- */
- #ifdef __KERNEL__
- #ifndef _ASM_PCI_BRIDGE_H
- #define _ASM_PCI_BRIDGE_H
- struct device_node;
- struct pci_controller;
- /*
- * pci_io_base returns the memory address at which you can access
- * the I/O space for PCI bus number `bus' (or NULL on error).
- */
- extern void *pci_bus_io_base(unsigned int bus);
- extern unsigned long pci_bus_io_base_phys(unsigned int bus);
- extern unsigned long pci_bus_mem_base_phys(unsigned int bus);
- /*
- * PCI <-> OF matching functions
- */
- extern int pci_device_from_OF_node(struct device_node *node,
- u8* bus, u8* devfn);
- extern struct device_node* pci_device_to_OF_node(struct pci_dev *);
- /* Get the PCI host controller for a bus */
- extern struct pci_controller* pci_bus_to_hose(int bus);
- /* Get the PCI host controller for an OF device */
- extern struct pci_controller*
- pci_find_hose_for_OF_device(struct device_node* node);
- /* Fill up host controller resources from the OF node */
- extern void
- pci_process_bridge_OF_ranges(struct pci_controller *hose,
- struct device_node *dev, int primary);
- /*
- * Structure of a PCI controller (host bridge)
- */
- struct pci_controller {
- int index; /* used for pci_controller_num */
- struct pci_controller *next;
- struct pci_bus *bus;
- void *arch_data;
- int first_busno;
- int last_busno;
-
- void *io_base_virt;
- unsigned long io_base_phys;
-
- /* Some machines (PReP) have a non 1:1 mapping of
- * the PCI memory space in the CPU bus space
- */
- unsigned long pci_mem_offset;
- struct pci_ops *ops;
- volatile unsigned int *cfg_addr;
- volatile unsigned char *cfg_data;
- /* Currently, we limit ourselves to 1 IO range and 3 mem
- * ranges since the common pci_bus structure can't handle more
- */
- struct resource io_resource;
- struct resource mem_resources[3];
- int mem_resource_count;
- };
- /* These are used for config access before all the PCI probing
- has been done. */
- int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 *val);
- int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 *val);
- int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 *val);
- int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn, int where, u8 val);
- int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn, int where, u16 val);
- int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn, int where, u32 val);
- #endif
- #endif /* __KERNEL__ */